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Defeat of Germany and Japan February 4-11: Yalta Conference meeting of FDR, Churchill, Stalin - the 'Big Three'
Soviet Union has control of Eastern Europe. The Cold War Begins -
"Sinews of Peace" Iron Curtain Speech by Winston Churchill - "an "iron curtain" has descended on Europe"
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March 12 : Truman Doctrine - Truman declares active role in Greek Civil War
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Truman Doctrine - Truman declares active role in Greek Civil War
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Communist takeover in Czechoslovakia
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NATO ratified
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October 1 : Communist Mao Zedong takes control of China and establishes the People's Republic of China
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Truman approved H-bomb development
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January 12 : Federal Civil Defense Administration established
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Truman fires MacArthur
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Federal Civil Defense Administration established
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June 4 Nuclear Arms Race atomic test series of 11 explosions at Nevada Test Site
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H-bomb Castle-Bravo test
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USSR sent tanks into Poznan, Poland, to suppress demonstrations by workers
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Vostok rocket launched 1st ICBM
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Berlin border is closed
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Nuclear Test Ban Treaty ratified